JP2015535051A - Cylinder head of water-cooled internal combustion engine and water-cooled internal combustion engine equipped with this cylinder head - Google Patents

Abstract

The present invention comprises an upper cylinder head (87) and a lower cylinder head (88) manufactured separately, and includes a fuel injector hole (876), an intake valve stem hole (8812) and an exhaust valve stem hole (8822). ) Are respectively formed in the upper cylinder head portion of the fuel injector hole, the upper cylinder head portion of the intake valve stem hole and the upper cylinder head portion of the exhaust valve stem hole, and the lower cylinder head (88) formed in the upper cylinder head (87). The fuel injector hole lower cylinder head portion, the intake valve stem hole lower cylinder head portion, and the exhaust valve stem hole lower cylinder head portion that are formed, the intake passage (887) and the exhaust passage (889), Formed in the lower cylinder head (88), the head side water jacket (83) The water jacket upper cylinder head portion formed on the cylinder (87) and the water jacket lower cylinder head portion formed on the lower cylinder head (88), or integrated with the lower cylinder head (88). A cylinder head (80) for a water-cooled internal combustion engine is provided.

Description

  The present invention relates to a cylinder head of a water-cooled internal combustion engine, a water-cooled internal combustion engine provided with the cylinder head, and a mechanical device to which the water-cooled internal combustion engine provided with the cylinder head is attached.

  Conventionally, a cylinder head of a water-cooled internal combustion engine having a cooling water jacket is known. For example, the specifications and drawings of Chinese Patents ZL200100139399.7 and ZL200410082513.8 disclosed a kind of horizontal water-cooled single cylinder diesel engine. As shown in the sectional view of the water-cooled cylinder head in the drawings of the above patent, the cooling water jacket of the cylinder head surrounds the outer wall of the fuel injector mounting hole, the outer wall of the intake passage, and the outer wall of the exhaust passage. The shape is complicated, and it is necessary to cast a water-cooled cylinder head with a sand core for a water jacket. The production of sand cores requires the use of sand and an adhesive, and the environment may be contaminated by dust cleaning and casting of the sand core. Furthermore, since the structure of the conventional water-cooled cylinder head is complicated and it is difficult to release the die casting mold and to pull out the core, it cannot be manufactured by a die casting process. In addition, the specification and drawings of Chinese Patent ZL94194819.6 disclose a cylinder head of an air-cooled single-cylinder diesel engine manufactured by a kind of die-casting, in which a complicated spiral intake passage is pulled out in stages. This is the first time that die casting has been achieved. In the specification and drawings of the Chinese patent application with the application number 2000004800425.3, the die-casting method for the entire cylinder head of the air-cooled diesel engine and the die-casting die used in the method are further disclosed. Conventionally, both the main body of a water-cooled / air-cooled internal combustion engine and the cylinder head of the air-cooled internal combustion engine are often die-cast manufactured with an aluminum alloy, so that the function as a cylinder head of a water-cooled internal combustion engine is satisfied. Easy to die-cast water-cooled cylinder head, simple process, reliable, practical and economical, energy saving and environmental protection, easy to mass production and use There is an urgent need to invent a new water-cooled cylinder head structure.

  The shape of each of the fuel injector hole, the intake passage hole and the exhaust passage hole in the water jacket of the conventional water-cooled cylinder head is complicated, the cylinder head body surrounds the water jacket, and the intake passage and the exhaust passage are water. Since it is housed in the jacket, it is difficult to design a die-casting die, and a water-cooled cylinder head cannot be manufactured by a die-casting process of mold release and core drawing.

  The present invention can manufacture a water-cooled cylinder head by a normal mold release and core drawing die casting process, and can manufacture spiral complicated intake passages and exhaust passages whose shapes are curved by the die casting process. In order to be able to die-cast spiral intake and exhaust passages having a curved shape in a water-cooled multi-cylinder internal combustion engine, an integral water-cooled cylinder head is divided into two or more different cylinder head bodies. Provides a technical plan to connect to an integrated water-cooled cylinder head after manufacturing and use a combination of various processes such as conventional die casting, pressing, die forging, plus, welding, bonding, screw connection, riveting, etc. Easy to process, good quality, good economy, energy saving, environmental friendly With, it is easy to mass-production and use.

  In the present invention, as a technical solution used to solve the technical problem, a water-cooled cylinder head is manufactured by dividing it into two different cylinder head bodies, and an intake passage 887, an exhaust passage 889, a water jacket 83, A cylinder head 80 having a fuel injector hole 876, an intake valve stem hole 8812, and an exhaust valve stem hole 8822, and is constituted by an upper cylinder head 87 and a lower cylinder head 88 that are separately manufactured, Among them, the fuel injector hole 876, the intake valve stem hole 8812 and the exhaust valve stem hole 8822 are respectively a fuel injector hole upper cylinder head portion and an intake valve stem hole upper cylinder head formed in the upper cylinder head 87, respectively. And exhaust valve stem hole upper cylinder head, The lower cylinder head 88 includes a fuel injector hole lower cylinder head part, an intake valve stem hole lower cylinder head part, and an exhaust valve stem hole lower cylinder head part. The exhaust passage 889 is formed in the lower cylinder head 88, and the head side water jacket 83 is formed in the water jacket upper cylinder head portion formed in the upper cylinder head 87 and the lower cylinder head 88. It is comprised by the water jacket lower cylinder head part, or is formed in the said lower cylinder head 88 integrally.

  The upper cylinder head 87 and the lower cylinder head 88 are connected by welding, bonding, screw connection and / or riveting to constitute the cylinder head 80.

  A technique in which the upper cylinder head 87 and the lower cylinder head 88 are welded to form an integral cylinder head 80 by employing welding over the entire circumference of the joint surface between the upper cylinder head and the lower cylinder head. In the method, the connection and sealing between the upper cylinder head and the lower cylinder head are realized by the weld bead, and it is not necessary to use a sealing material at the welding portion between the upper cylinder head 87 and the lower cylinder head 88.

  Adhesion, screw connection and riveting are employed on the joint surface between the upper cylinder head and the lower cylinder head, whereby the upper cylinder head 87 and the lower cylinder head 88 are connected to form an integral cylinder head 80. In the technical plan, the upper cylinder head and the lower cylinder head are connected by bonding, screw connection and riveting, and a sealing material is used for the joint surface between the upper cylinder head 87 and the lower cylinder head 88. Seal by doing. Further, in the technical method for connecting the upper cylinder head and the lower cylinder head by using a combination of welding, bonding, screw connection and / or riveting, a sealing material is used for a part of the place where the weld bead exists. There is no need.

  As a technical solution to be connected by welding, for example, a fuel injector hole side O-ring is provided around the corresponding joint surface opening of the fuel injector hole upper cylinder head part and / or the fuel injector hole lower cylinder head part. A groove 885 is formed, and corresponding joint surfaces of the intake valve stem hole upper cylinder head part, the exhaust valve stem hole upper cylinder head part and / or the intake valve stem hole lower cylinder head part, and the exhaust valve stem hole lower cylinder head part. Are respectively provided with an intake valve stem hole side O-ring groove 872 and an exhaust valve stem hole side O-ring groove 873, and the upper cylinder head 87 is provided with an upper cylinder head bolt hole 871. The lower cylinder head 88 is provided with a lower cylinder head bolt hole 881, and the upper cylinder head. Inside the opening of the corresponding joint surface of the bolt hole 871 and / or the cylinder head bolt hole 881, a water jacket seal ring groove 883 that goes around the outer periphery of the head side water jacket 83 is provided, and the fuel injector hole side The O-ring groove 885, the intake valve stem hole side O-ring groove 872, the exhaust valve stem hole side O-ring groove 873, and the water jacket seal ring groove 883 are fitted with seal rings, respectively. A weld bead 803 that goes around the joint surface is provided outside the joint surface with the side cylinder head 88, and the upper cylinder head 87 and the lower cylinder head 88 are welded by the weld bead 803 to form the cylinder head 80. Is done.

  As a technical solution to be connected by bonding, for example, an adhesive seal material is applied around the opening of the corresponding joint surface of the fuel injector hole upper cylinder head part and the fuel injector hole lower cylinder head part, and the intake valve Adhesive sealant around the corresponding joint surface openings of the stem hole upper cylinder head, exhaust valve stem hole upper cylinder head, intake valve stem hole lower cylinder head, and exhaust valve stem hole lower cylinder head. The upper cylinder head 87 is provided with an upper cylinder head bolt hole 871, and the lower cylinder head 88 is provided with a lower cylinder head bolt hole 881. Adhesive seal material is formed around the opening of the corresponding joint surface of the cylinder head bolt hole 881. An adhesive sealing material is applied to the corresponding joint surfaces of the upper cylinder head 87 and the lower cylinder head 88 so as to go around the joint surface of the head-side water jacket 83. The cylinder head 88 is configured by being bonded to the cylinder head 88 with an adhesive sealing material.

  As a technical method to be connected by screw connection, for example, around the opening of the corresponding joint surface of the fuel injector hole upper cylinder head part and / or the fuel injector hole lower cylinder head part, the fuel injector hole side O Ring grooves 885 are provided and corresponding joints of the intake valve stem hole upper cylinder head part, the exhaust valve stem hole upper cylinder head part and / or the intake valve stem hole lower cylinder head part and the exhaust valve stem hole lower cylinder head part. An intake valve stem hole side O-ring groove 872 and an exhaust valve stem hole side O-ring groove 873 are provided around the opening of the surface, respectively, and an upper cylinder head bolt hole 871 is provided in the upper cylinder head 87. The lower cylinder head 88 is provided with a lower cylinder head bolt hole 881 so that the upper cylinder head A water jacket seal ring groove 883 that circulates around the outer periphery of the head side water jacket 83 is provided inside the corresponding joint surface opening of the bolt hole 871 and / or the cylinder head bolt hole 881. Seal rings are fitted into the ring groove 885, the intake valve stem hole side O-ring groove 872, the exhaust valve stem hole side O-ring groove 873, and the water jacket seal ring groove 883, respectively. Is provided with a countersunk hole 8713 that can pass through, a female screw for screwing the through hole bolt 8710 into the opening of the lower cylinder head bolt hole 881, and a cylinder head bolt at the axial center of the through hole bolt 8710. 74 is provided with a bolt through-hole 8711 for passing 74; The through-hole bolt 8710 passes through the countersink 8713 and is screwed into the female screw at the opening of the lower cylinder head bolt hole 881, and the upper cylinder head 87 and the lower cylinder head 88 are connected to the through-hole bolt 8710 and / or The cylinder head 80 is configured by screw connection with screws.

  As a technical solution to be connected by riveting, for example, the fuel injector hole side O around the opening of the corresponding joint surface of the fuel injector hole upper cylinder head part and / or the fuel injector hole lower cylinder head part. Ring grooves 885 are provided and corresponding joints of the intake valve stem hole upper cylinder head part, the exhaust valve stem hole upper cylinder head part and / or the intake valve stem hole lower cylinder head part and the exhaust valve stem hole lower cylinder head part. An intake valve stem hole side O-ring groove 872 and an exhaust valve stem hole side O-ring groove 873 are provided around the opening of the surface, respectively, and an upper cylinder head bolt hole 871 is provided in the upper cylinder head 87. The lower cylinder head 88 is provided with a lower cylinder head bolt hole 881, and the upper A water jacket seal ring groove 883 that circulates the outer periphery of the head side water jacket 83 is provided on the inner side of the opening of the corresponding joint surface of the cylinder head bolt hole 881 and / or the cylinder head bolt hole 881, A seal ring is fitted in each of the hole side O-ring groove 885, the intake valve stem hole side O-ring groove 872, the exhaust valve stem hole side O-ring groove 873, and the seal ring groove 883 for the water jacket. A rivet pipe 801 that passes through the hole 871 and the lower cylinder head bolt hole 881 is provided, and a through hole 805 that allows the cylinder head bolt 74 to pass through is provided at the center of the rivet pipe 801 in the axial direction. Perform riveting and tighten rivets. The cylinder head 80 and an upper cylinder head 87 and the lower cylinder head 88 is riveted by a rivet tube 801 is constructed.

  The present invention can also be applied to a cylinder head of a water-cooled internal combustion engine to which a camshaft push rod is attached. In this case, the cylinder head 80 further includes a cam shaft push rod hole 85, the cam shaft push rod hole 85 further includes a cam shaft push rod hole 85, and the cam shaft push rod hole 85 is an upper cylinder head. The camshaft push rod hole upper cylinder head part formed on the lower cylinder head 88 and the cam shaft push rod hole lower cylinder head part formed on the lower cylinder head 88, or integrated with the lower cylinder head 88. The camshaft push rod hole 85 is not provided inside the outer edge of the upper cylinder head 87.

  Further, in order to form a better cooling water flow space between the intake passage 887 and the exhaust passage 889 in the lower cylinder head 88 and the bottom of the lower cylinder head 88, the water-cooled cylinder head of the present invention further includes 3 It can be manufactured in two different parts. For example, the following technical scheme can be adopted. That is, the lower cylinder head 88 is composed of two parts, a lower cylinder head upper part 8819 and a lower cylinder head lower part 8818, which are separately manufactured, and the lower cylinder head upper part 8819 and the lower cylinder head lower part 8818. 8818 is divided by a lower cylinder head dividing surface x8, and the intake passage 887 has an intake passage parallel portion whose axial direction is parallel to the lower cylinder head dividing surface x8, and an axial direction of the lower cylinder head. An exhaust passage vertical portion perpendicular to the dividing surface x8, and the exhaust passage 889 includes an exhaust passage parallel portion that is parallel to the lower cylinder head dividing surface x8, and an axial direction to the lower cylinder head dividing surface x8. A vertical exhaust passage vertical portion, and the lower cylinder head dividing surface x8 includes the intake passage vertical portion and the exhaust passage vertical portion. The intake port of the intake passage 887 and the exhaust port of the exhaust passage 889 are entirely provided in the lower cylinder head upper portion 8819, and the lower cylinder head lower portion 8818 has an intake valve stem hole 8812 and an axial direction. The corresponding intake valve line 8810 is formed in the lower cylinder head lower portion 8818, and the exhaust valve line 8820 corresponding to the exhaust valve stem hole 8822 in the axial direction is formed in the lower cylinder head lower portion 8818. And a seal ring and / or an adhesive seal material are provided on the joint surface between the lower cylinder head upper part 8819 and the lower cylinder head lower part 8818, and the lower cylinder head upper part 8819 and the lower cylinder head lower part are provided. 8818 means welding, gluing, screw connection and / or riveting. Thus, the lower cylinder head 88 is configured.

  Furthermore, the water-cooled cylinder head can be further divided into four different cylinder head bodies. For example, in order to manufacture curved spiral intake passages and exhaust passages in which the cores of various die casting molds cannot be drawn by the die casting method, the following technical schemes can be adopted. That is, the lower cylinder head 88 is composed of three parts, a lower cylinder head lower part 8818, a lower cylinder head middle part 8817, and a lower cylinder head upper part 8816, which are separately manufactured. The lower cylinder head middle portion 8817 is divided by a first dividing surface x6 in the lower cylinder head, and the lower cylinder head middle portion 8817 and the lower cylinder head lower portion 8818 are second in the lower cylinder head. And the intake passage 887 is parallel to the intake passage parallel portion whose axial direction is parallel to the first divided surface x6 of the lower cylinder head and the second divided surface x7 of the lower cylinder head. And the axial direction is the first dividing surface x6 of the lower cylinder head. And an intake passage vertical portion perpendicular to the second split surface x7 in the lower cylinder head, and the exhaust passage 889 includes the first split surface x6 in the lower cylinder head and the first split surface in the lower cylinder head. An exhaust passage parallel portion parallel to the two split surfaces x7, and an exhaust passage vertical portion whose axial direction is perpendicular to the first split surface x6 of the lower cylinder head and the second split surface x7 of the lower cylinder head The first dividing surface x6 in the lower cylinder head halves the intake passage parallel portion of the intake passage 887 and the exhaust passage parallel portion of the exhaust passage 889, and the second division in the lower cylinder head The dividing surface x7 of the cylinder cuts only the vertical portion of the intake passage and the vertical portion of the exhaust passage, and the lower cylinder head lower portion 8818 has an intake valve valve. An intake valve line 8810 corresponding to the axial hole 8812 is formed in the lower cylinder head lower portion 8818, and an exhaust valve line 8820 corresponding to the exhaust valve stem hole 8822 in the axial direction is formed to lower the lower cylinder head. 8818 has a fuel injector opening 886 formed on the joint surface between the intake passage 887 and the exhaust passage 889 in the first division surface x6 in the lower cylinder head and the second division x7 in the lower cylinder head. Are each provided with a seal ring and / or an adhesive seal, and the lower cylinder head upper part 8816, the lower cylinder head middle part 8817 and the lower cylinder head lower part 8818 are welded, bonded, screwed and / or riveted to each other The lower cylinder head 88 is configured by being connected by .

  The upper cylinder head 87 can be divided into a plurality of parts. Further, the lower cylinder head 88 is manufactured by being divided into five, six or more cylinder head bodies, and further connected by welding, bonding, screw connection and / or riveting to constitute the cylinder head 80. You can also. With the development of technology for adhesive sealing material, metal powder may be added to the adhesive sealing material, welding, bonding, without cutting the joint surface of the cylinder head body manufactured separately. The cylinder head 80 can be configured by connecting a plurality of cylinder head bodies manufactured separately by screw connection and / or riveting.

  Even when the cylinder head bolt hole is designed to be compact so that the storage space for the through-hole bolt 8710 and / or the rivet pipe 801 cannot be increased, the cylinder head body manufactured separately is tightened and connected. Therefore, screw holes 888 and through holes 882 are provided at positions other than the cylinder head bolt holes 871 and 881 and the camshaft push rod hole 85 and tightened and connected, and through holes are provided and rivets are formed using ordinary solid rivets. You may make it tighten. Cylinder head manufactured separately after attaching to the internal combustion engine a cylinder head made by connecting separately manufactured cylinder head bodies that have passed the leak test due to excellent uniformity and certainty of tightening with cylinder head bolts Even if the screws or rivets for tightening the body are loosened, the cylinder head can be used reliably without leaks.

  The above connection methods such as welding, bonding, screw connection and / or riveting may be used in combination with the same set of cylinder heads 80, for example, the same set of upper cylinder head 87 and lower cylinder head 88. In the connection process, welding, bonding, screw connection, and riveting may be employed for each of the plurality of portions. In addition, screw connection and / or riveting may be applied to the bonding, welding may be performed before the adhesive is cured, and an adhesive sealing material and a seal ring are attached to the joining surface of each cylinder head split surface. It may be used simultaneously to connect and seal.

  The above screw connection and rivet tightening can be carried out in the cylinder head bolt hole for tightening the cylinder head to the main body, and the dedicated bolt and dedicated rivet for tightening the upper cylinder head and the lower cylinder head to the integrated cylinder head When the cylinder has a central through hole and the cylinder head is attached to the body, the cylinder head bolt should pass through the central through hole in the same way as a conventional integrated cylinder head in order to cool the cylinder head easily. Hold a relatively large water jacket as much as possible. When the interval between certain cylinder head bolts increases, screw connection between the cylinder head bolt holes, rivets, in order to realize a seal when the upper cylinder head and the lower cylinder head are tightened to form an integral cylinder head The number of tightening holes may be increased, or the cylinder head bolt hole may not be selected as a connection hole for screw connection or rivet tightening.

  The intake valve stem hole 8812 and / or the exhaust valve stem hole 8822 may be fitted with the intake valve stem hole conduit 8811 and / or the exhaust valve stem hole conduit 8821. Furthermore, the intake valve stem hole and the exhaust valve stem Simultaneously fitting the valve stem hole conduit into the hole is advantageous for positioning when connecting the upper cylinder head and the lower cylinder head and for sealing when tightening.

  In addition to sealing the gas in the cylinder, the cylinder head gasket between the cylinder head and the main body has a thickness stability when the cylinder head bolt is tightened, which affects the combustion efficiency of the internal combustion engine. A boss 8815 is further provided at the opening of the lower cylinder head bolt hole 881 in the cylinder head 88, and the plane of the boss 8815 is pressed against the plane of the main body across the cylinder head gasket, and the height of the boss is the thickness of the cylinder head gasket. Due to this difference, the elastic deformation of the cylinder head gasket in a state where the cylinder head bolt is tightened may be ensured within an optimum design numerical value range.

  A rivet fastening boss 8814 is provided at the opening of the through hole 805 of the rivet pipe 801 on the bottom surface of the lower cylinder head, and after cutting the bottom surface of the lower cylinder head, the lower cylinder head and the upper cylinder head are riveted. In addition, the rivet tightening boss 8814 can ensure the elastic deformation of the cylinder head gasket within the optimum design numerical range when the cylinder head bolt is tightened.

  A water passage hole 830 that directly communicates with the head side water jacket 83 and a blind hole 840 that does not communicate directly with the head side water jacket 83 are provided on the bottom surface of the lower cylinder head 88. A groove 850 for communicating 830 and blind hole 840 may be provided.

  A groove 850 is provided on the bottom surface of the lower cylinder head 88 so as to go around the water passage hole 81, the water passage hole 830, and the blind hole 840. You may make it do.

  The water passage hole between the lower portion of the intake passage 887 and the exhaust passage 889 and the bottom surface of the lower cylinder head 88 may adopt a structure that partially communicates with the head side water jacket 83. In this case, A structure in which an annular water flow path exists between the bottom surface of the lower cylinder head 88 and the cylinder head gasket can be realized, and the cylinder head and the cylinder head gasket can be cooled with water better.

  Moreover, in order to improve the intensity | strength of the whole cylinder head and to reduce manufacturing cost, you may manufacture an upper cylinder head with a metal plate, especially a steel plate. In this case, the entire head side water jacket 83 is formed on the lower cylinder head 88. Since parts at different positions of the cylinder head are manufactured separately, different materials can be used for each part, further reducing costs.

  Since the cylinder head formed by connecting the cylinder head bodies manufactured separately according to the present invention is attached to the main body of the internal combustion engine, the tightening torque of the cylinder head bolt for screwing into the main body and tightening the cylinder head is stabilized. The sealed connection between the upper cylinder head and the lower cylinder head can be ensured for a long time. Also, there is no mounting connection hole between the cylinder head and the main body on the tightening connection surface between the upper cylinder head and the lower cylinder head, and the lower cylinder head is mounted on the main body without the cylinder head bolt contacting the upper cylinder head. In the case of direct tightening, the upper cylinder head and the lower cylinder head can be connected by welding, bonding, screw connection and / or riveting to form an integral cylinder head. However, since the sealing connection effect between the upper cylinder head and the lower cylinder head is ensured for a long time, there is a high demand for uniformity and certainty of the clamping force for clamping and connecting the cylinder head to the main body by the cylinder head bolt Since the design position of various cylinder head bolt holes must be excellent in uniformity and validity, it is a reasonable choice to perform screw connection or riveting to the cylinder head bolt holes, Does not affect the function design space.

  Further, the water-cooled internal combustion engine of the present invention is a water-cooled internal combustion engine including a main body 70 and a piston 20, and the main body 70 is attached with the cylinder head 80 according to any one of the above-described various technical solutions. It is characterized by being.

  Furthermore, the mechanical device to which the water-cooled internal combustion engine of the present invention is attached is a mechanical device including a main body 70 of the water-cooled internal combustion engine and the piston 20, and the various techniques described above are applied to the main body 70 of the water-cooled internal combustion engine. The cylinder head 80 according to any one of the methods is attached.

  Furthermore, according to the cylinder head of the water-cooled internal combustion engine in one embodiment of the present invention, the cylinder head 80 includes the intake passage 887, the exhaust passage 889, the head side water jacket 83, the fuel injector hole 876, the intake valve stem. The cylinder head 80 includes an upper cylinder head 87 and a lower cylinder head 88 that are separately manufactured. The upper cylinder head 87 includes a hole 8812, an exhaust valve stem hole 8822, and a camshaft push rod hole 85. The lower cylinder head 88 is provided with a through-hole through which a fuel injector hole 876, an intake valve stem hole 8812, and an exhaust valve stem hole 8822 integrally die-cast are passed. Intake passage 887, exhaust passage 889, head side water A jacket 83, a fuel injector hole 876, an intake valve stem hole 8812 and an exhaust valve stem hole 8822 are provided, and the camshaft push rod hole 85 is a camshaft push rod hole upper cylinder head formed in the upper cylinder head 87. And a camshaft push rod hole lower cylinder head portion formed in the lower cylinder head 88, and a cylinder head bolt hole is formed on the outer peripheral joint surface of the upper cylinder head 87 and the lower cylinder head 88. A weld bead (8030) that circulates inside the through hole for use is formed, and a weld bead 8031 is formed on the outer periphery of the fuel injector hole 876 that is die-cast integrally with the lower cylinder head 88 and the connection through hole of the upper cylinder head 87. Is provided on the lower cylinder head 88. A weld bead 8032 is provided in the outer periphery of the cast intake valve stem hole 8812 and the connection through hole of the upper cylinder head 87, and the outer periphery and upper side of the exhaust valve stem hole 8822 integrally die-cast in the lower cylinder head 88. A weld bead 8033 is provided in the connection through hole of the cylinder head 87, and a weld bead 8034 is provided around the opening of the connection hole of the camshaft push rod hole 85 on the divided surface of the upper cylinder head 87 and the lower cylinder head 88. The upper cylinder head 87 and the lower cylinder head 88 are welded by a weld bead 8030, a weld bead 8031, a weld bead 8032, a weld bead 8032, and a weld bead 8034 to constitute the cylinder head 80.

  Furthermore, according to the cylinder head of the water-cooled internal combustion engine of one embodiment of the present invention, the intake passage 887, the exhaust passage 889, the head side water jacket 83, the fuel injector hole 876, the intake valve stem hole 8812, the exhaust valve. The cylinder head 80 includes a stem hole 8822 and a camshaft push rod hole 85, and the cylinder head 80 includes an upper cylinder head 87 and a lower cylinder head 88 that are separately manufactured. Is provided with a through hole for allowing the fuel injector hole 876, the intake valve stem hole 8812, the exhaust valve stem hole 8822, and the cylinder head bolt hole 871 that are integrally die-cast to the lower cylinder head 88 to pass therethrough, The lower cylinder head 88 has an intake passage 887. An exhaust passage 889, a head-side water jacket 83, a fuel injector hole 876, a cylinder head bolt hole 871, an intake valve stem hole 8812 and an exhaust valve stem hole 8822 are provided, and the camshaft push rod hole 85 is formed on the upper cylinder head. The upper cylinder head 87 and the lower cylinder head are constituted by a camshaft push rod hole upper cylinder head portion formed in 87 and a cam shaft push rod hole lower cylinder head portion formed in the lower cylinder head 88. A weld bead 803 that circulates around the outer periphery thereof is provided on the joint surface with the 88, and is welded to the outer periphery of the fuel injector hole 876 that is die-cast integrally with the lower cylinder head 88 and the connection through hole of the upper cylinder head 87. Bead 8031 is provided and the lower A weld bead 8032 is provided in the outer periphery of the intake valve stem hole 8812 die-cast integrally with the lower head 88 and in the connection through hole of the upper cylinder head 87, and the exhaust valve stem integrally die-cast with the lower cylinder head 88. A weld bead 8033 is provided in the outer periphery of the hole 8822 and the connection through hole of the upper cylinder head 87, and around the opening of the connection hole of the camshaft push rod hole 85 on the dividing surface of the upper cylinder head 87 and the lower cylinder head 88. A weld bead 8034 is provided, and a weld bead 8035 is provided around the opening of the connection hole between the upper cylinder head 87 and the upper cylinder head bolt hole 871, and the upper cylinder head 87 and the lower cylinder head 88 are connected to each other by a weld bead 803. , Welding bead 8031, welding bead 8032, welding The cylinder head 80 is configured by welding with the bead 8033, the weld bead 8034, and the weld bead 8035.

  Further, on the outer wall of the cylinder head (80), a through hole 8762 for extracting a core corresponding to the die-cast release dead zone of each of the fuel injector hole 876, the intake passage 887 and / or the exhaust passage 889, and A sealing plug 8863 is provided.

  According to the water-cooled internal combustion engine of one embodiment of the present invention, the main body 70 and the cylinder head 80 according to any one of the above-described embodiments attached to the main body 70 are provided.

  The present invention relates to a cylinder head of a single-cylinder or multi-cylinder water-cooled internal combustion engine, a water-cooled internal combustion engine including the cylinder head, a cylinder head of a horizontal or vertical water-cooled internal combustion engine, and a water-cooled internal combustion engine including the cylinder head. The following beneficial effects can be achieved. That is, after the cylinder head is divided into an upper cylinder head and a lower cylinder head, or the lower cylinder head and / or the upper cylinder head is further divided into a plurality of parts and manufactured separately, the upper cylinder head and the lower cylinder head A cylinder head is connected to form a cylinder head of an internal combustion engine. (When the upper cylinder head and / or the lower cylinder head is further divided into a plurality of parts, first, the plurality of parts are connected to each other to connect the upper cylinder head. By configuring the head and / or the lower cylinder head), it is possible to achieve smooth release of the die casting mold and core drawing in multiple directions, and to realize die casting of the cylinder head of the internal combustion engine. Can do. In addition, when the intake passage and the exhaust passage are divided in half and die-cast separately, the curved spiral complex intake passage and exhaust passage can be easily die-cast, and the quality of the separately die-cast cylinder head is improved. Good, simple process, easy to assemble and cost effective. Furthermore, by adopting a structure in which an annular water flow path is provided between the bottom surface of the cylinder head and the cylinder head gasket, the water cooling effect on the cylinder head and the cylinder head gasket is improved. According to the present invention, since the cylinder head can be divided and die-cast and then assembled into an integral cylinder head, the conventional die-casting process using a sand core and sand mold is not required, and environmental pollution can be reduced. it can. In addition, because die casting is adopted, the weight of the cylinder head can be reduced by selecting a lighter metal material, and the overall weight of the engine can be reduced, thus saving energy such as fuel. This is advantageous for environmental protection.

  Hereinafter, the present invention will be further described with reference to the drawings and examples.

It is sectional drawing which shows the structure of a kind of water-cooling type single cylinder internal combustion engine. 1 is a cross-sectional view showing a structure of a water-cooled single-cylinder internal combustion engine having a cylinder head according to one embodiment of the present invention when viewed from the direction F in FIG. 1, showing a split surface kk of the cylinder head. Yes. It is drawing when the water-cooled single cylinder internal combustion engine of this invention is seen from the E direction in FIG. It is drawing when the cylinder head of the water-cooling type single cylinder internal combustion engine of this invention is seen from the E direction in FIG. It is drawing when the cylinder head of the water-cooling type single cylinder internal combustion engine of this invention is seen from the E direction in FIG. FIG. 2 is a view of the cylinder head of the water-cooled single cylinder internal combustion engine of the present invention as viewed from the direction G in FIG. Groove 850 is provided. The structure of the Example by which an upper cylinder head and a lower cylinder head are connected by welding and / or adhesion | attachment, and a cylinder head is comprised is shown. The structure of the Example by which an upper cylinder head and a lower cylinder head are connected by screw connection and / or riveting and a cylinder head is comprised is shown. It is sectional drawing which shows the state by which the seal ring was inserted by the seal ring groove | channel. It is sectional drawing which shows the Example whose connection division | segmentation surface of an upper cylinder head and a lower cylinder head is a curved surface. It is sectional drawing when the division surface of the cylinder head in one Example is seen from the K direction in FIG. FIG. 5 is a cross-sectional view of the cylinder head shown in FIG. FIG. 5 is a cross-sectional view of the cylinder head shown in FIG. It is a perspective view when the cylinder head of a kind of water-cooling type four cylinder internal combustion engine is seen from the side upper part. It is a perspective view when the cylinder head of the water-cooled four-cylinder internal combustion engine shown in FIG. 14 is viewed from the lower side. FIG. 15 is a right side sectional view of a cylinder head of the water-cooled four-cylinder internal combustion engine in FIG. 14. The cylinder head is divided into an upper cylinder head and a lower cylinder head, and the lower cylinder head is further separated from an upper portion and a lower portion of the lower cylinder head. The Example divided | segmented into the side cylinder head lower part is shown. FIG. 15 is a bottom view of the half intake passage and the exhaust passage of the water-cooled four-cylinder internal combustion engine shown in FIG. 14. FIG. 15 is a plan view of a half-split intake passage and an exhaust passage of the water-cooled four-cylinder internal combustion engine shown in FIG. 14. It is AA sectional drawing of another Example of the cylinder head shown in FIG. It is drawing when the cylinder head shown in FIG. 19 is seen from the E direction in FIG. The water flow space is directly die-cast into the fuel injector hole lower die cast dead zone, exhaust pipe lower die cast dead zone, and intake pipe lower die cast dead zone by the movable mold core inserted into the cylinder head body from multiple directions. An example is shown. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. FIG. 6 is a plan view showing an embodiment in which welding is adopted for the entire circumference of the joint surface between the upper cylinder head 87 and the lower cylinder head 88. It is AA sectional drawing of FIG. It is CC sectional drawing of FIG. It is sectional drawing in the case of using in combination the seal ring groove | channel, the adhesive sealing material, and the sealing material which does not have adhesiveness in the Example of the same division | segmentation type cylinder head. It is sectional drawing which shows another Example which employ | adopts welding to the joint surface of the upper cylinder head 87 and the lower cylinder head 88 over a perimeter.

The present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing the structure of a kind of water-cooled single cylinder internal combustion engine. As shown in FIG. 1, the internal combustion engine includes a main body 70 and a cylinder head 80 attached to the main body 70. A water passage hole 830 in the cylinder head indicated by a broken line communicates with a water passage hole 73 in the main body correspondingly. The head-side water jacket 83 of the cylinder head 80 is complicated in shape and has a body around it, so that conventionally, it has to be cast with a sand core.

  2 is a cross-sectional view showing the structure of the water-cooled single cylinder internal combustion engine as viewed from the direction F in FIG. As shown in FIG. 2, the cylinder head 80 includes a head-side water jacket 83, an intake passage 887, and an exhaust passage 889. FIG. 3 is a drawing of the water-cooled single cylinder internal combustion engine of the present invention as viewed from the direction E in FIG. As shown in FIG. 3, the cylinder head 80 of the single cylinder internal combustion engine is fastened to the main body 70 of the internal combustion engine by a cylinder head bolt 74.

  As is apparent from FIG. 2, the head-side water jacket 83 of the cylinder head 80 surrounds the intake passage 887 and the exhaust passage 889 and has a complicated shape. According to the conventional viewpoint of this field, the die-cast release mold Therefore, it is impossible to manufacture by die casting, and it is necessary to cast a cylinder head integrally and to cast a water jacket by a sand core. However, as the inventor researched, this is a kind of traditional prejudice. According to the present invention, as shown in FIG. 2, for example, a cylinder head is manufactured by dividing the cylinder head into an upper cylinder head and a lower cylinder head on a kk dividing surface, and a head-side water jacket having a complicated shape By splitting into a water jacket upper cylinder head part formed on the upper cylinder head and a water jacket lower cylinder head part formed on the lower cylinder head, which allows die casting release and core drawing, The die casting of the cylinder head and the lower cylinder head can be realized, and the water jacket, the intake passage, the exhaust passage, and the fuel injector hole can be die-cast at a time.

  4 and 5 are views when viewed from the direction E in FIG. 1, and are for showing the upper cylinder head 87. FIG. FIG. 6 is a view when viewed from the G direction in FIG. 1, and shows the lower cylinder head 88. The upper cylinder head 87 and the lower cylinder head 88 are connected by welding, bonding, screw connection and / or riveting to constitute the cylinder head 80.

  As shown in FIG. 4, the upper cylinder head 87 is provided with a screw hole 888 for fastening the upper cylinder head 87 to the lower cylinder head 88. As shown in FIG. 5, the upper cylinder head 87 is further provided with a screw hole 877 for connecting a valve swing arm support.

  As shown in FIG. 6, the lower cylinder head 88 is provided with a water jacket seal ring groove 883 that circulates around the water jacket 83, and a water passage hole 830 and a blind hole 840 provided in the lower cylinder head 88. The main body side water jacket 72 and the head side water jacket 83 communicate with each other through the water passage hole 81, and a groove 850 is provided between the water passage hole 830, the blind hole 840, and the water passage hole 81. It is done. Further, the manufacture of the groove by die casting is very easy, the positioning accuracy is high, and the blind hole 840 and the water passage hole 830 can be communicated with each other through the groove 850.

  FIG. 7 shows an embodiment in which a cylinder head is formed by connecting an upper cylinder head and a lower cylinder head by welding and / or adhesion. In FIG. 7, reference numeral 803 indicates a weld bead, and reference numeral 802 indicates an adhesive seal material. In FIG. 7, for convenience of understanding, a weld bead 803 and an adhesive seal material 802 are shown at the same time, but the connection between the upper cylinder head and the lower cylinder head is independent of the welding method or the adhesion method. It should be understood that two schemes may be employed simultaneously. FIG. 7 further shows a fuel injector hole-side O-ring groove 885 formed around the fuel injector hole 876 on the dividing surface, and a water jacket-side O-ring groove 883 formed around the head-side water jacket. When the upper cylinder head 87 and the lower cylinder head 88 are assembled, the fuel injector hole side O-ring groove 885 and the water jacket side O-ring groove are used to seal the fuel injector hole and the water jacket. An O-ring is attached to each of 883. Further, when the upper cylinder head 87 and the lower cylinder head 88 are connected by bonding, a sealing structure with an O-ring groove may be employed at the same time in order to obtain a better sealing effect. Therefore, the sealing structure by the O-ring groove may be omitted. Further, as shown in FIG. 7, cylinder head bolt holes for fixing the cylinder head 80 to the main body 70 are formed in the upper cylinder head bolt hole 871 formed in the upper cylinder head 87 and the lower cylinder head 88. The fuel injector hole 876 is divided into a fuel injector hole upper cylinder head portion formed in the upper cylinder head 87 and a fuel injector hole lower cylinder head portion. The

  FIG. 8 shows an embodiment in which a cylinder head is configured by connecting an upper cylinder head and a lower cylinder head by screw connection and / or riveting. As shown in FIG. 8, the upper cylinder head 87 and the lower cylinder are improved by improving the upper cylinder head bolt hole 871 and the lower cylinder head bolt hole 881 in the cylinder head and screwing a bolt 8710 with a through hole. The head 88 is integrally tightened to constitute the cylinder head 80. In this case, the cylinder head bolt can pass through the bolt through hole 8711 formed in the bolt 8710 with the through hole, and the integral cylinder head 80 can be fastened to the main body 70. Further, sealing is realized by fitting the seal ring 800 into the intake valve stem hole side O-ring groove 872, the exhaust valve stem hole side O-ring groove 873, and the water jacket seal ring groove 883. On the other hand, for example, the upper cylinder head 87 and the lower cylinder head 88 may be fastened by a metal rivet pipe 801 to constitute an integral cylinder head 80. The rivet pipe 801 is provided with a relatively small thickness in order to save space. In FIG. 8, the rivet pipe 801 is provided with a boss 8814, but the rivet pipe 801 is not provided with a boss, and the rivet end faces at both ends of the rivet pipe 801 are connected to the upper surface of the upper cylinder head 87 and the lower cylinder head 88. You may make it match with a bottom face. When assembling the upper cylinder head and the lower cylinder head with rivet pipes, the rivet fastening of a plurality of rivet pipes in a multi-cylinder internal combustion engine can be performed simultaneously. Without changing the hole position in the coordinate system of the conventional design of the cylinder head, it can be separately manufactured and assembled into an integral cylinder head only by inserting the rivet pipe into the cylinder head bolt hole. Similarly, for convenience of understanding, FIG. 8 shows two types of connection methods of screw connection and riveting simultaneously in one cylinder head structure, but the upper cylinder head and the lower cylinder head For the connection, screw connection or riveting may be employed alone, or these two types of connection methods may be employed simultaneously.

  Further, for the connection of the cylinder head, any one of connection methods such as welding, adhesion, screw connection and riveting may be selected, or any combination of these connection methods may be used. Good. Then, the fitting of the seal ring into the seal ring groove or the application of the adhesive seal material may be employed alone, or these two sealing methods may be employed simultaneously.

  11 is a sectional view of the cylinder head shown in FIG. 2 in the K direction. In FIG. 11, the blind hole 840 is indicated by a broken line because it is shielded by the intake passage 887 or the exhaust passage 889. One water passage hole 830 in the upper right of this figure is not shielded by the intake passage 887 at its upper half portion, and therefore can directly communicate with the head-side water jacket 83. Here, the water passage hole 830 is provided here. Is referred to as a semi-through hole. Further, in FIG. 11, an intake valve stem hole 8812 and an exhaust valve stem hole 8822 are further shown. An intake valve stem side O-ring groove 872 and an exhaust valve stem side O-ring groove 873 are provided around the intake valve stem hole 8812 and the exhaust valve stem hole 8822, respectively.

  FIG. 9 shows an example in which the seal ring 800 is fitted into the intake valve stem-side O-ring groove 872, and a deformation amount x1 is generated when the seal ring 800 is pressed to realize an elastomer seal. be able to. Although not shown, it should be understood that the seal ring is also inserted into the exhaust valve stem side O-ring groove 873.

  A connection dividing surface between the upper cylinder head 87 and the lower cylinder head 88 can be formed in a plane for easy connection and sealing. Further, the connection dividing surface between the upper cylinder head 87 and the lower cylinder head 88 may be formed in a shape that can be connected and sealed, such as a curved surface, a step surface, a sawtooth surface, and the like corresponding to each other. As shown in FIG. 10, a convex curved surface is formed around the intake passage 887 in the lower cylinder head, and a concave curved surface corresponding to the convex curved surface is formed in the upper cylinder head 87. 887 protrudes upward in the connection surface between the upper cylinder head 87 and the lower cylinder head 88. Further, although not shown, the exhaust passage 889 may similarly be disposed so as to protrude upward in the connection surface between the upper cylinder head 87 and the lower cylinder head 88.

  Further, FIG. 12 shows an embodiment in which the fuel injector hole 876 is manufactured integrally with the lower cylinder head 88, and the fuel injector hole 876 is shown in the figure. A fuel injector opening 886 is formed at the front end of the hole 876. The embodiment shown in FIG. 12 differs from the embodiment shown in FIG. 7 in that the fuel injector hole 876 is formed integrally with the lower cylinder head 88. As shown in FIG. 12, a fuel injector is provided by placing an insert 8761 in a portion where die-casting is difficult to perform, and leaving the insert in a mold before die-casting and removing the insert after die-casting is completed. A hole 876 can be formed integrally with the lower cylinder head 88.

  As shown in FIG. 13, when the integrated lower cylinder head 88 is manufactured, the insert 8891 is left in the mold before die casting, and the shape of the insert 8891 is the intake passage, exhaust passage, and lower cylinder head. The insert 8891 is removed after die casting is completed, corresponding to the shape of the head-side water jacket 83 between the bottom of the 88. The insert 8891 is necessary, and the time for leaving the insert 8891 in the mold before die-casting and the removal of the insert 8891 from the mold after die-casting is artificial, so that cost reduction and production efficiency can be reduced. It is disadvantageous for improvement. Therefore, preferably, the lower cylinder head 88 is constituted by a lower cylinder head upper part and a lower cylinder head lower part separately manufactured, and a cylinder head dividing surface x8 between the lower cylinder head upper part and the lower cylinder head lower part. Is located in the head-side water jacket 83 of the lower cylinder head 88, and a seal ring 800 and / or an adhesive sealant 802 is also provided on the joint surface between the upper part of the lower cylinder head and the lower part of the lower cylinder head. , No insert 8891 is required. After the upper cylinder head 87, the lower cylinder head upper portion, and the lower cylinder head lower portion are separately die-cast, the cylinder head 80 is further connected by welding, bonding, screw connection and / or riveting.

  The present invention can be applied not only to a water-cooled single cylinder internal combustion engine but also to a water-cooled multi-cylinder internal combustion engine.

  For example, FIG. 14 shows a cylinder head of a kind of water-cooled four-cylinder internal combustion engine, and each four-valve combustion chamber includes two intake valves and two exhaust valves, The exhaust passage has a curved spiral shape, and further includes a main intake passage connecting the eight intake passages 887, and the cavities of the intake passage and the exhaust passage are complicated in shape. Since the core cannot be pulled out in the process, it is directly die-cast by the process of pulling out the core in the lateral direction.

  FIG. 15 is a perspective view of the water-cooled four-cylinder internal combustion engine shown in FIG. 14 as viewed from the lower side. A cooling water flow port 810 is provided on the upper side of the exhaust passage 889.

  FIG. 16 is a right sectional view of the water-cooled four-cylinder internal combustion engine shown in FIG. 14 in order to solve the problem of further dividing and manufacturing the lower cylinder head 88 of the single-cylinder and / or multi-cylinder water-cooled internal combustion engine. The entire outer wall of the intake passage and the exhaust passage and the head side water jacket 83 are provided below the cylinder head dividing surface x5. Further, since the intake passage and the exhaust passage are halved by the first dividing surface x6 in the lower cylinder head, the spiral intake and exhaust passages having a curved shape are formed by die casting without performing core extraction. Can be manufactured. Furthermore, in order to cut the head-side water jacket 83 between the intake passage 887 and the exhaust passage 889 and the bottom of the cylinder head 88 by the second dividing surface x7 in the lower cylinder head, the insert 8891 and the complicated sand Avoid using children. Further, the lower cylinder head upper portion 8816, the lower cylinder head middle portion 8817, and the lower cylinder head lower portion 8818 are connected by welding, bonding, screw connection and / or riveting to form the lower cylinder head 88, and the upper cylinder head The head 87, the lower cylinder head upper part 8816, the lower cylinder head middle part 8817 and the lower cylinder head lower part 8818 are connected by welding, bonding, screw connection and / or riveting to constitute the cylinder head 80. According to the embodiment shown in FIG. 16, a complicated air passage having a curved spiral shape can be easily and directly die-cast. When the internal combustion engine cylinder head is designed to be divided based on the above-described embodiment, the number of reinforcing ribs for connecting each hole in the water jacket is increased without changing the original position of each hole. Each split body of the cylinder head is provided by a thin rivet pipe provided with a seal ring 800 and / or an adhesive seal material 802 on the joint surface of the corresponding split surface and disposed in the cylinder head bolt hole. The cylinder head 80 is configured by rivet tightening, and the rivet tightening of the cylinder head division by the rivet pipes in a plurality of holes can be easily performed once, satisfying the design requirements of the original cylinder head The cost is low and product consistency can be easily guaranteed.

  FIG. 17 is a bottom view of the half intake passage and the half exhaust passage of the water-cooled four-cylinder internal combustion engine in FIG. The exhaust passage is tightened and connected to form an integral cylinder head 80, which can be easily sealed with a conventional adhesive sealant.

  18 is a plan view of the half-split intake passage and the half-split exhaust passage of the water-cooled four-cylinder internal combustion engine in FIG. The half-split surfaces of the half-split intake passage and the half-split exhaust passage are used as split surfaces of the die-cast mold, and then the seal ring 800 and / or the adhesive sealant 802 are attached to the joint surfaces of the cylinder head bodies separately die-cast. Install and configure cylinder head 80 by welding, gluing, screw connection and / or riveting. In the present invention, the intake passage and the exhaust passage of the cylinder head of the water-cooled internal combustion engine can be directly die-casted for the first time without removing the core, and the accuracy of the intake passage and the exhaust passage is improved. Efficiency is higher. In addition, an adhesive sealing material having characteristics such as high temperature resistance, aging resistance and high strength can be applied to the joint surface of the split cylinder head in the present invention, and cutting can be performed on a precision die-cast surface according to the prior art. Applying an adhesive seal material with characteristics such as high temperature resistance, aging resistance, and high strength without performing the process, and a cylinder head of a single cylinder or a multi-cylinder water-cooled internal combustion engine is automatically integrated into a large number of cylinder heads. Can be assembled into.

  Further, for example, in the divided surface of the cylinder head of the internal combustion engine shown in FIGS. 7, 13, 14, 15, 16, 17, 18 and / or 27, the cylinder head dividing surface x5, the lower cylinder head The welding of the cylinder head joint surfaces on both sides of the first divided surface x6 in FIG. 2, the second divided surface x7 in the lower cylinder head and / or the lower cylinder head divided surface x8 employs the following welding method. be able to.

  1. Cylinder head dividing surface x5, first dividing surface x6 in the lower cylinder head, second dividing surface x7 in the lower cylinder head and / or cylinder head joining surfaces on both sides of the lower cylinder head dividing surface x8 The electrode plate is disposed so as to completely cover the cylinder head joining surfaces on both sides of the dividing surface, the cylinder head joining surfaces on both sides of the dividing surface are brought close to the electrode plate, and the electrode plate is energized. When the high temperature is transmitted to the joining surfaces of the cylinder heads on both sides and the joining surfaces of the cylinder heads on both sides are in a molten state, the electrode plates are extracted and brought into contact with the joining surfaces of the cylinder heads on both sides. The cylinder head 80 is welded.

  2. Cylinder head dividing surface x5, first dividing surface x6 in the lower cylinder head, second dividing surface x7 in the lower cylinder head and / or cylinder head joining surfaces on both sides of the lower cylinder head dividing surface x8 An elongated electrode with a length equal to or exceeding the length or width of the cylinder head joint surface on both sides of the split surface is placed on one side of the extension line to accommodate the cylinder head joint surface on both sides of the split surface High temperature is generated by energizing and fixing the long electrode disposed on one side. In addition, the radial center is aligned with the tight junction surface of the cylinder heads on both sides, and after the axial direction is parallel to the cylinder head split surface, the long electrode is moved toward the cylinder head to The cylinder head material in the advancing direction is melted by the high temperature due to the energization of the electrodes, and the melted cylinder head material is fused to the back of the advancing direction along the radial direction of the long electrode, so that the cylinder heads on both sides are joined. Weld together. More preferably, the dividing surface of the cylinder head is vertically arranged and correspondingly fixedly fixed, and the long electrode is aligned with the closely bonded surfaces of the cylinder heads on both sides in the radial direction, and the axial direction is the cylinder head. The cylinder head material, which is moved from below to above so as to be parallel to the dividing surface and melted by high temperature, flows on the radial surface of the elongated electrode due to gravity and flows in the radial direction of the elongated electrode. And the cylinder heads on both sides are integrally welded.

  3. Cylinder head dividing surface x5, first dividing surface x6 in the lower cylinder head, second dividing surface x7 in the lower cylinder head and / or cylinder head joining surfaces on both sides of the lower cylinder head dividing surface x8 A circular metal rod capable of high-speed rotation with a length equal to or exceeding the length or width of the joining surface of the cylinder head on both sides of the dividing surface is arranged on one side of the extension line, and the radial center is on both sides The circular metal rod is rotated at a high speed by moving the circular metal rod toward the cylinder head after the axial direction is parallel to the cylinder head splitting surface. When contact is made with the cylinder head joint surface on both sides of the dividing surface, a high temperature is generated by friction, and the circular metal rod that rotates at high speed melts. Cylinder head material is fused to the rear in the traveling direction along the radial direction of the circular metal rod that rotates at a high speed, thereby integrally welded on both sides of the cylinder head. More preferably, the dividing surface of the cylinder head is vertically arranged and correspondingly fixedly fixed, and the circular metal rod is aligned with the closely bonded surfaces of the cylinder heads on both sides in the radial direction, and the axial direction is the cylinder head. The cylinder head material is moved from below to above so as to be parallel to the dividing surface, and the material of the cylinder head melted by the high temperature flows on the radial surface of a circular metal rod that rotates at high speed by gravity. The cylinder heads on both sides are integrally welded together by fusing to the rear in the traveling direction along the radial direction of the electrodes.

  4. Cylinder head dividing surface x5, first divided surface x6 in the lower cylinder head, second divided surface x7 in the lower cylinder head and / or extension of the cylinder head joint surface on both sides of the lower cylinder head divided surface x8 Place the laser on one side of the line, align the center of the laser beam in the radial direction with the tightly bonded surfaces of the cylinder heads on both sides, and after the axial direction is parallel to the cylinder head split surface, place the laser on the cylinder head The cylinder head material in the traveling direction of the laser beam is melted by the high temperature generated by the laser beam, and the melted cylinder head material is fused backward in the traveling direction along the radial direction of the laser beam. The cylinder head is welded together. More preferably, the dividing surface of the cylinder head is arranged vertically and is fixed in close contact, and the laser beam is aligned with the close contact surfaces of the cylinder heads on both sides and the axial direction of the laser beam is in the cylinder. The material of the cylinder head, which is moved from below to above so as to be parallel to the split surface of the head and melted by the high temperature, flows and merges behind the direction of travel along the radial direction of the laser beam by gravity. The cylinder heads on both sides are welded together.

  The present invention can also be applied to a cylinder head of an internal combustion engine having a camshaft push rod.

  For example, in FIG. 19, the entire fuel injector hole 876 is die-cast integrally with the lower cylinder head 88, and the upper cylinder head 87 is die-cast with a through hole through which the fuel injector hole 876 passes. The fuel injector hole 876 and the lower cylinder head 88 are integrally welded by the bead 8031. Also, welding of the intake valve stem hole 8812, the exhaust valve stem hole 8822, the camshaft push rod hole 85, and the upper cylinder head 87 can be realized by the above structure. The weld bead 8030 circulates around the outer periphery of the joint surface between the upper cylinder head 87 and the lower cylinder head 88. The core drawing through hole 8762 corresponds to the die-cast release dead zone of the fuel injector hole 876, the intake passage 887 and / or the exhaust passage 889, and a die-casting mold movable core is used instead of the inserts 8761, 8891. By doing so, the flow of the cooling water in the water jacket becomes smooth and the thickness of the die casting becomes uniform. The core extraction through hole 8762 is sealed with a sealing plug 8863. The lubricating oil between the camshaft push rod holes 85 is conducted through the oil passage 851 of the camshaft push rod, and the connection holes of the camshaft push rod holes 85 on the divided surfaces of the upper cylinder head 87 and the lower cylinder head 88 are made. A weld bead 8034 is provided around the opening.

  FIG. 20 shows a kind of embodiment, in which the cylinder head bolt hole 871 is opened so as to be U-shaped outward, so that the weld bead 8030 is connected to the upper cylinder head 87 and the lower side. It becomes easy to go around the outer periphery of the joint surface with the cylinder head 88. A U-shaped opening toward the outside of the cylinder head bolt hole 871 is provided only at the circumferential position of the weld bead 8030 on the outer periphery of the joint surface between the upper cylinder head 87 and the lower cylinder head 88. Since the cylinder head bolt holes 871 and 881 can still be formed in circular through holes, the strength thereof is increased. The fuel injector hole 876, the intake valve stem hole 8812, the exhaust valve stem hole 8822, and the camshaft push rod hole 85 are integrated with the upper cylinder head 87 by a weld bead 8031, a weld bead 8032, a weld bead 8033, and a weld bead 8034. Welded. The camshaft push rod hole 85 passes through the upper cylinder head 87 and the lower cylinder head 88.

  According to another modification of the embodiment shown in FIG. 20, the cylinder head bolt through hole is an upper cylinder head bolt hole 871 as shown in the upper left of FIG. 20 and is die-cast integrally with the lower cylinder head 88. The upper cylinder head bolt hole 871 thus formed passes through a connection through hole formed in the upper cylinder head 87 in advance, and is welded integrally to the upper cylinder head 87 by a weld bead 8035. The upper cylinder head 87 and the lower cylinder head 88 are welded by a weld bead 803 that goes around the outer periphery of the cylinder head to constitute the cylinder head 80.

  20 does not require the use of the seal ring 800 and / or the adhesive sealant 802 on the corresponding joint surfaces of the split cylinder heads in the above two embodiments shown in FIG. 20, and the surface of the weld bead is the cylinder. Since it is lower than the connection surface between the head and other parts, it is not necessary to perform polishing or cutting, and it is suitable for automatically connecting a large number of split cylinder heads of a water-cooled internal combustion engine by welding. Further, FIG. 21 shows a fuel injector hole lower die cast dead zone, an exhaust pipe lower die cast dead zone, and an intake pipe lower die cast dead zone by a movable mold core inserted into the cylinder head body from a plurality of directions. Fig. 6 shows an embodiment in which the water-flowing space is directly die-casted. The movable mold core 8765 and / or the movable mold core 8766 inserted into the lower die cast dead zone of the intake pipe are extracted to the outside at the time of mold release, and the sealing plug in the fuel injector hole is fitted. A stepped hole 8768 for fitting, a stepped hole 8769 for fitting a sealing plug in the exhaust pipe and / or a sealing plug in the intake pipe Each of the stepped holes 8770 is fitted with a sealing plug 8863 corresponding to the shape of each stepped hole, and the connection between the sealing plug and the stepped hole is performed by welding, bonding, screw connection and Sealing can be achieved by methods such as riveting. In addition, when using screw connection and / or riveting, a sealing material is disposed on the joint surface between the sealing plug and the stepped hole.

  22 is a cross-sectional view taken along the line AA in FIG. As shown in this figure, the mold movable core 8774 inserted in the die-cast dead zone on the lower side of the fuel injector hole is extracted to the outside when the die-cast is released, and the sealing plug in the fuel injector hole is inserted. Sealing can be realized by fitting a sealing plug 8863 into the stepped hole 8768.

  23 is a cross-sectional view taken along the line BB in FIG. As shown in this figure, die casting is performed in a state where the mold convex body 8767 in the lower cylinder head is in close contact with the movable mold core 8765 inserted in the lower die cast dead zone of the exhaust pipe, and the pressure holding of the die casting is completed. When the mold is released, the movable mold core 8765 inserted in the lower die cast dead zone of the exhaust pipe is extracted, so that the water passage hole 830 communicates with the head side water jacket 83 and is cooled. Water can flow smoothly into the high temperature region between the intake and exhaust pipes and the bottom of the cylinder head.

  24, 25, and 26, an integral cylinder head 80 is configured by connecting a split cylinder head by welding without applying a sealing material to the joint surface between the upper cylinder head and the lower cylinder head. Yet another embodiment is shown.

  In FIG. 24, a weld bead 8036 that circulates the outer edge of the head-side water jacket 83 of the lower cylinder head 88 correspondingly around the outer edge of the upper cylinder head 87 is provided, and a fuel injector hole 876 in the lower cylinder head 88. The intake valve stem hole 8812 and the exhaust valve stem hole 8822 respectively pass through the through hole for the fuel injector hole, the through hole for the intake valve stem hole, and the through hole for the exhaust valve stem in the upper cylinder head 87, respectively. Exposed to the head 87, the upper cylinder head 87 includes a fuel injector hole weld bead 8031 that goes around the fuel injector hole 876, an intake valve stem hole weld bead 8032 that goes around the intake valve stem hole 8812, and an exhaust valve stem. Exhaust valve stem hole weld bead that goes around hole 8822 033 and are provided, the upper cylinder head 87 and the lower cylinder head 88, the weld bead 8036,8031, weld bead 8032, are connected by weld bead 8033 cylinder head 80 is formed. In this embodiment, the cylinder head bolt hole 881 and the camshaft push rod hole 85 located outside the head side water jacket 83 circulate outside the outer edge of the upper cylinder head 87 and around the outer periphery of the head side water jacket 83. Formed outside the weld bead 8036.

  In the present embodiment, as described above, it is not necessary to use a sealing material, but the upper cylinder head 87 and the lower cylinder head 88 are not welded to the upper cylinder head 87 in the present embodiment. A sealing material may be installed on the joint surface, and the upper cylinder head 87 and the lower cylinder head 88 may be tightened by the screw holes 888 to constitute an integrated cylinder head 80. Or you may connect by a rivet instead of said clamping screw. Furthermore, the upper cylinder head 87 and the lower cylinder head 88 may be connected by an adhesive seal material without using a tightening member to form an integral cylinder head 80. The upper cylinder head 87 and the lower cylinder head 88 are connected by using a combination of welding, bonding, screw connection and / or riveting at the joint surface between the upper cylinder head and the lower cylinder head in the present embodiment. Thus, an integral cylinder head 80 may be configured.

  FIG. 25 is a cross-sectional view taken along the line AA of FIG. 24. The fuel injector hole 876 manufactured integrally with the lower cylinder head 88 passes through the through hole in the upper cylinder head 87 and passes through the upper cylinder head 87. The upper cylinder head 87 is exposed by a fuel injector hole weld bead 8031 that is exposed and circulates around the fuel injector hole 876, and a weld bead 8036 that circulates correspondingly around the outer periphery of the head-side water jacket 83 of the lower cylinder head 88. The lower cylinder head 88 is connected to form an integral cylinder head 80.

  26 is a cross-sectional view taken along the line CC of FIG. 24. The exhaust valve stem hole 8822 manufactured integrally with the lower cylinder head 88 passes through the through hole in the upper cylinder head 87 and passes through the upper cylinder head 87. The upper cylinder head 87 is exposed by the exhaust valve stem hole weld bead 8033 that is exposed and circulates around the exhaust valve stem hole 8822 and the weld bead 8036 that circulates correspondingly around the outer periphery of the head-side water jacket 83 of the lower cylinder head 88. The lower cylinder head 88 is connected to form an integral cylinder head 80. The intake valve stem hole weld bead 8032 that goes around the intake valve stem hole 8812 can be arranged in the same manner as the structure shown in this figure.

  The upper cylinder head 87 in FIGS. 24, 25 and 26 includes the upper cylinder head in another embodiment, and can be manufactured by a flat plate. When the upper cylinder head 87 is manufactured by a flat plate, the entire head side water jacket 83 is formed on the lower cylinder head 88.

  FIG. 27 shows an embodiment in which various kinds of sealing materials are used in combination. Among them, a sealing material 806 having no adhesiveness on the joint surface between the lower cylinder head lower portion 8818 and the lower cylinder head upper portion 8819 is shown. It is used, and sealing can be realized by pressing at the time of tightening connection. Further, an adhesive seal material 802 is used for the joint surface between the screw hole 888 and the through hole 882, and a seal ring groove 883 is used for the joint surface between the upper cylinder head 87 and the lower cylinder head upper portion 8819.

  In FIG. 28, a cylinder head bolt hole 881 formed in the lower cylinder head 88, a fuel injector hole 876, an intake valve stem hole 8812 and an exhaust valve stem hole 8822 are formed in a cylinder head bolt hole formed in the upper cylinder head 87. Through the through hole for fuel injector, through hole for fuel injector hole, through hole for intake valve stem hole and through hole for exhaust valve stem hole, respectively, and exposed to the upper surface of the upper cylinder head 87, and the lower cylinder head 88 The intake passage 887 and the exhaust passage 889 that are formed in the upper cylinder head 87 are adjacent to the intake passage through hole and the exhaust passage through hole that are formed in the upper cylinder head 87, respectively. Cylinder head bolt hole weld bead 8035 and fuel injector hole 876 A fuel injector hole weld bead 8031 that circulates, an intake valve stem hole weld bead 8032 that circulates around the intake valve stem hole 8812, and an exhaust valve stem hole weld bead 8033 that circulates around the exhaust valve stem hole 8822 are provided. The upper cylinder head 87 is provided with an intake passage and exhaust passage hole weld bead 8037 that circulates through the intake passage and the exhaust passage through-hole, and is formed on the joint surface between the lower portion of the upper cylinder head 87 and the bottom portion of the lower cylinder head 88. A weld bead 8030 that goes around the outer periphery of the cylinder head is provided, and the upper cylinder head 87 and the lower cylinder head 88 include the weld bead 8030, the weld bead 8031, the weld bead 8032, the weld bead 8033, the weld bead 8035, and the weld. Connected by bead 8037 Cylinder head 80 is configured. Further, the mold release gradient a causes the welding bead 8037 to be formed by bringing the intake passage hole and the exhaust passage hole in the lower cylinder head 88 close to each intake passage hole and the exhaust passage hole through hole in the upper cylinder head 87 correspondingly. Make it easy to form. Further, when the lower cylinder head 88 is die-casted based on the above structure, the intake passage, the exhaust passage, the fuel injector hole, and the cylinder head bolt hole are all exposed above the bottom of the head side water jacket 83. It is necessary to use a sealing plug 8863 because die casting and multi-directional core drawing are easier, and the interface between the intake and exhaust passages and the bottom of the cylinder head is sealed by the weld bead 8030. And the integrity and aesthetics of the connection between the upper cylinder head 87 and the lower cylinder head 88 are improved. Since the exhaust passage and the intake passage are correspondingly arranged and can be connected by the same structure, in the drawing, the opening of the intake passage 887 in the lower cylinder head and the corresponding through hole in the upper cylinder head 87 are joined. The sectional view in which the surface is welded by the weld bead 8037 is shown, and the sectional view of the exhaust passage is omitted. Since the cylinder head bolt hole, fuel injector hole, intake passage and exhaust passage are all manufactured integrally with the lower cylinder head, the lower cylinder head 88 withstands the tightening force and high temperature of the cylinder head bolt and is resistant to Design requirements such as having vibration properties can be satisfied, and the upper cylinder head 87 in this embodiment can be used by selecting a press-formed product. When this embodiment is applied to a cylinder head having a camshaft push rod hole, the camshaft push rod hole manufactured integrally with the lower cylinder head is also similar in structure to the cylinder head bolt hole in this embodiment. Can be connected to the upper cylinder head.

  Furthermore, in the embodiment in which sealing is realized by welding without using a sealing material on the joint surface between the upper cylinder head 87 and the lower cylinder head 88 described above, the upper cylinder head 87 and the lower cylinder head are bonded by an adhesive sealing material. 88 may be connected to form an integral cylinder head 80, or the upper cylinder head 87 and the lower cylinder head may be formed by using welding for some of them and bonding for other parts. 88 may be connected to an integral cylinder head 80. Further, the upper cylinder head 87 and the lower cylinder head 88 may be connected to the integral cylinder head 80 by a combination of screw connection, riveting, welding and / or adhesion. The present invention can be applied to a water-cooled single cylinder internal combustion engine and a water-cooled multi-cylinder internal combustion engine, both of which are included in the protection scope of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Fuel injector, 20 ... Piston, 29 ... Air cleaner, 30 ... Muffler, 40 ... Cylinder liner, 50 ... Water tank, 60 ... Fuel tank, 70 ... Main body, 72 ... Main body side water jacket, 73 ... Main body and cylinder Head through hole, 74 ... cylinder head bolt, 75 ... fuel injector, 76 ... cylinder head cover, 80 ... cylinder head, 81 ... cylinder head and body through hole, 83 ... head side water jacket, 84 ... cylinder head 85 ... Cam shaft push rod hole, 86 ... Cam shaft push rod, 87 ... Upper cylinder head, 88 ... Lower cylinder head, 90 ... Cylinder cover, 201 ... Piston outline, 800 ... Seal ring, 801 ... Rivet pipe, 802 ... adhesive sealant, 803 ... weld bead, 030... Weld bead that circulates around the outer periphery of the joint surface between the upper cylinder head and the lower cylinder head, 8031. Fuel injector hole weld bead, 8032. Intake valve stem hole weld bead, 8033 ... exhaust valve stem hole weld bead, 8034 ... Camshaft push rod hole weld bead, 8035 ... Cylinder head bolt hole weld bead, 8036 ... Weld bead that circulates correspondingly to the outer edge of the water jacket at the outer edge of the upper cylinder head, 8037 ... Intake passage and exhaust passage in the upper cylinder head Welding bead that circulates through the opening of the through hole for the intake passage and the exhaust passage in the lower cylinder head and the lower cylinder head, 804... Recess for rivet, 805... Through hole, 806. Water flow port, 830 ... water flow hole, 840 Blind hole, 850 ... groove, 871 ... Upper cylinder head bolt hole, 872 ... Intake valve stem hole side O-ring groove, 873 ... Exhaust valve stem hole side O-ring groove, 875 ... Fuel injector clamping hole, 876 ... Fuel injection Instrument hole, 877 ... Screw hole for connecting valve swing arm support, 8710 ... Bolt with through hole, 8711 ... Bolt through hole, 8712 ... Screw thread in bolt, 8713 ... Countersink, 8761 ... Insert, 8762 ... Core Extraction through-hole, 8863 ... sealing plug, 8964 ... mold movable core fitted in the lower die cast dead zone of the fuel injector hole, 8765 ... mold movable core fitted in the lower die cast dead zone of the exhaust pipe , 8766... Mold movable core fitted into the lower die cast dead zone of the intake pipe, 8767. Mold convex body of the lower cylinder head, 8768. Stepped hole for fitting the sealing plug into the fuel injector hole, 8769... Stepped hole for fitting the sealing plug into the exhaust pipe, 8770... For fitting the sealing plug into the intake pipe Stepped hole, 881 ... Lower cylinder head bolt hole, 882 ... Screw connection through hole, 883 ... Water jacket seal ring groove, 885 ... Fuel injector hole side O-ring groove, 886 ... Fuel injector opening, 887 Intake passage, 888 ... Screw hole, 889 ... Exhaust passage, 8809 ... Through hole for screw connection, 8810 ... Intake valve line, 8811 ... Intake valve stem hole conduit, 8812 ... Intake valve stem hole, 8813 ... Intake valve stem, 8814 ... Riveting boss, 8815 ... Boss, 8816 ... Lower cylinder head upper part, 8817 ... Lower cylinder head middle part, 8818 ... Lower cylinder head lower part, 8 DESCRIPTION OF SYMBOLS 19 ... Upper cylinder head upper part, 8820 ... Exhaust valve line, 8821 ... Exhaust valve stem hole conduit, 8822 ... Exhaust valve stem hole, 8823 ... Exhaust valve stem, 8891 ... Insert, x1 ... Pushing deformation amount of seal ring, x2 ... Boss altitude, x3 ... cylinder head gasket thickness, x4 ... compression deformation after tightening cylinder head gasket, x5 ... cylinder head split surface, x6 ... first split surface in lower cylinder head, x7 ... bottom Second split surface in the side cylinder head, x8 ... lower cylinder head split surface, a ... mold release gradient

Claims (22)

An intake passage (887), an exhaust passage (889), a head side water jacket (83), a fuel injector hole (876), an intake valve stem hole (8812), and an exhaust valve stem hole (8822). A cylinder head of a water-cooled internal combustion engine comprising:
The upper cylinder head (87) and the lower cylinder head (88) manufactured separately are configured,
The fuel injector hole (876), the intake valve stem hole (8812), and the exhaust valve stem hole (8822) are formed in the upper cylinder head (87), respectively. A valve stem hole upper cylinder head portion and an exhaust valve stem hole upper cylinder head portion; a fuel injector hole lower cylinder head portion formed in the lower cylinder head (88); an intake valve stem hole lower cylinder head portion; Exhaust valve stem hole lower cylinder head part,
The intake passage (887) and the exhaust passage (889) are formed in the lower cylinder head (88),
The head side water jacket (83) includes a water jacket upper cylinder head portion formed on the upper cylinder head (87) and a water jacket lower cylinder head portion formed on the lower cylinder head (88). Cylinder head configured or formed integrally with the lower cylinder head (88).   The cylinder head according to claim 1, wherein a joint surface between the upper cylinder head (87) and the lower cylinder head (88) is sealed by a seal ring and / or an adhesive seal material.   The cylinder head according to claim 1, wherein a joint surface between the upper cylinder head (87) and the lower cylinder head (88) is sealed by a sealing material having no adhesiveness.   A weld bead that integrally connects the upper cylinder head (87) and the lower cylinder head (88) is formed on a joint surface between the upper cylinder head (87) and the lower cylinder head (88). The cylinder head according to claim 1, wherein: A fuel injector hole-side O-ring groove (885) is provided around the corresponding joint surface opening of the fuel injector hole upper cylinder head part and / or the fuel injector hole lower cylinder head part,
Around the opening of the corresponding joint surface of the intake valve stem hole upper cylinder head part, exhaust valve stem hole upper cylinder head part and / or intake valve stem hole lower cylinder head part, exhaust valve stem hole lower cylinder head part, An intake valve stem hole side O-ring groove (872) and an exhaust valve stem hole side O-ring groove (873) are provided, respectively.
The upper cylinder head (87) is provided with an upper cylinder head bolt hole (871),
The lower cylinder head (88) is provided with a lower cylinder head bolt hole (881),
Water jacket seal ring groove that circulates around the outer periphery of the head side water jacket (83) inside the opening of the corresponding joint surface of the upper cylinder head bolt hole (871) and / or the cylinder head bolt hole (881). (883) is provided,
Seal rings in the fuel injector hole side O-ring groove (885), intake valve stem hole side O-ring groove (872), exhaust valve stem hole side O-ring groove (873) and water jacket seal ring groove (883), respectively Is fitted,
A weld bead (803) that circulates around the joint surface is provided outside the joint surface between the upper cylinder head (87) and the lower cylinder head (88).
The cylinder head according to claim 1, wherein the upper cylinder head (87) and the lower cylinder head (88) are welded by the weld bead (803) to constitute the cylinder head (80). Adhesive sealing material is applied around the opening of the corresponding joint surface of the fuel injector hole upper cylinder head part and / or the fuel injector hole lower cylinder head part,
Adhere around the corresponding joint surface openings in the intake valve stem hole upper cylinder head, exhaust valve stem hole upper cylinder head, intake valve stem hole lower cylinder head, and exhaust valve stem hole lower cylinder head. Sealing material is applied,
The upper cylinder head (87) is provided with an upper cylinder head bolt hole (871),
The lower cylinder head (88) is provided with a lower cylinder head bolt hole (881),
Adhesive seal material is applied around the opening of the corresponding joint surface of the upper cylinder head bolt hole (871) and the cylinder head bolt hole (881),
An adhesive seal material is applied to the corresponding joint surfaces of the upper cylinder head (87) and the lower cylinder head (88) so as to go around the joint surface of the head side water jacket (83),
The cylinder head according to claim 1, wherein the upper cylinder head (87) and the lower cylinder head (88) are bonded together by an adhesive seal material to constitute the cylinder head (80). A fuel injector hole-side O-ring groove (885) is provided around the corresponding joint surface opening of the fuel injector hole upper cylinder head part and / or the fuel injector hole lower cylinder head part,
Around the opening of the corresponding joint surface of the intake valve stem hole upper cylinder head part, exhaust valve stem hole upper cylinder head part and / or intake valve stem hole lower cylinder head part, exhaust valve stem hole lower cylinder head part, An intake valve stem hole side O-ring groove (872) and an exhaust valve stem hole side O-ring groove (873) are provided, respectively.
The upper cylinder head (87) is provided with an upper cylinder head bolt hole (871),
The lower cylinder head (88) is provided with a lower cylinder head bolt hole (881),
A water jacket seal ring groove (883) that goes around the outer periphery of the head side water jacket (83) inside the opening of the corresponding joint surface of the upper cylinder head bolt hole (871) and / or the cylinder head bolt hole (881). )
Seal rings in the fuel injector hole side O-ring groove (885), intake valve stem hole side O-ring groove (872), exhaust valve stem hole side O-ring groove (873) and water jacket seal ring groove (883), respectively Is fitted,
The upper cylinder head (87) is provided with a countersunk hole (8713) through which the through hole bolt (8710) can pass, and the through hole bolt (8710) is screwed into the opening of the lower cylinder head bolt hole (881). A bolt through hole (8711) through which the cylinder head bolt (74) passes is provided at the axial center of the through hole bolt (8710), and the through hole bolt (8710) is a countersunk hole (8710). 8713) and threaded into the internal thread at the opening of the cylinder head bolt hole (881),
The cylinder head according to claim 1, wherein the upper cylinder head (87) and the lower cylinder head (88) are screw-connected by a through-hole bolt (8710) to constitute the cylinder head (80). . A fuel injector hole-side O-ring groove (885) is provided around the corresponding joint surface opening of the fuel injector hole upper cylinder head part and / or the fuel injector hole lower cylinder head part,
Around the opening of the corresponding joint surface of the intake valve stem hole upper cylinder head part, exhaust valve stem hole upper cylinder head part and / or intake valve stem hole lower cylinder head part, exhaust valve stem hole lower cylinder head part, An intake valve stem hole side O-ring groove (872) and an exhaust valve stem hole side O-ring groove (873) are provided, respectively.
The upper cylinder head (87) is provided with an upper cylinder head bolt hole (871),
The lower cylinder head (88) is provided with a lower cylinder head bolt hole (881),
A water jacket seal ring groove (883) that goes around the outer periphery of the head side water jacket (83) inside the opening of the corresponding joint surface of the upper cylinder head bolt hole (871) and / or the cylinder head bolt hole (881). )
Seal rings in the fuel injector hole side O-ring groove (885), intake valve stem hole side O-ring groove (872), exhaust valve stem hole side O-ring groove (873) and water jacket seal ring groove (883), respectively Is fitted,
A rivet pipe (801) penetrating the upper cylinder head (871) and the lower cylinder head (881) is provided;
A through hole (805) through which the cylinder head bolt (74) passes is provided at the axial center of the rivet pipe (801).
The upper cylinder head (87) and the lower cylinder head (88) are riveted by the rivet pipe (801) by performing riveting on both ends of the rivet pipe (801). The cylinder head according to claim 1, wherein the head is configured.   Camshaft push rod comprising a camshaft push rod hole upper cylinder head portion formed in the upper cylinder head (87) and a cam shaft push rod hole lower cylinder head portion formed in the lower cylinder head (88). The cylinder head according to claim 1, further comprising a hole (85). The lower cylinder head (88) is composed of two parts, a separately manufactured lower cylinder head upper part (8819) and a lower cylinder head lower part (8818),
The lower cylinder head upper part (8819) and the lower cylinder head lower part (8818) are divided by a lower cylinder head dividing surface (x8),
The intake passage (887) includes an intake passage parallel portion whose axial direction is parallel to the lower cylinder head dividing surface (x8), and an intake passage vertical portion whose axial direction is perpendicular to the lower cylinder head dividing surface (x8). With
The exhaust passage (889) includes an exhaust passage parallel portion parallel to the lower cylinder head dividing surface (x8) and an exhaust passage vertical portion whose axial direction is perpendicular to the lower cylinder head dividing surface (x8). Prepared,
The lower cylinder head dividing surface (x8) cuts only the intake passage vertical portion and the exhaust passage vertical portion,
The intake port of the intake passage (887) and the exhaust port of the exhaust passage (889) are generally provided in the upper part of the lower cylinder head (8819),
An intake valve line (8810) corresponding to the intake valve stem hole (8812) in the axial direction is formed in the lower cylinder head lower part (8818), and an exhaust valve stem hole (8822) is formed in the lower cylinder head lower part (8818). ) And an exhaust valve line (8820) corresponding to the axial direction is formed,
A fuel injector opening (886) is formed in the lower cylinder head lower portion (8818),
A seal ring and / or an adhesive seal material is provided on the joint surface between the lower cylinder head upper part (8819) and the lower cylinder head lower part (8818),
The lower cylinder head upper part (8819) and the lower cylinder head lower part (8818) are connected by welding, bonding, screw connection and / or riveting to form the lower cylinder head (88). The cylinder head according to any one of claims 1 to 8.   A weld bead for integrally connecting the lower cylinder head upper portion (8819) and the lower cylinder head lower portion (8818) is formed on the lower cylinder head dividing surface (x8). Item 11. The cylinder head according to Item 10. The lower cylinder head (88) is composed of three parts, a lower cylinder head lower part (8818), a lower cylinder head middle part (8817) and a lower cylinder head upper part (8816) manufactured separately,
The lower cylinder head upper part (8816) and the lower cylinder head middle part (8817) are divided by a first dividing surface (x6) in the lower cylinder head,
The lower cylinder head middle part (8817) and the lower cylinder head lower part (8818) are divided by a second dividing surface (x7) in the lower cylinder head,
The intake passage (887) has an intake passage parallel portion whose axial direction is parallel to the first divided surface (x6) of the lower cylinder head and the second divided surface (x7) of the lower cylinder head; An intake passage vertical portion whose axial direction is perpendicular to a first dividing surface (x6) in the lower cylinder head and a second dividing surface (x7) in the lower cylinder head;
The exhaust passage (889) includes an exhaust passage parallel portion that is parallel to the first divided surface (x6) of the lower cylinder head and the second divided surface (x7) of the lower cylinder head, and has an axial direction. An exhaust passage vertical part perpendicular to the first dividing surface (x6) in the lower cylinder head and the second dividing surface (x7) in the lower cylinder head,
The first dividing surface (x6) in the lower cylinder head halves the intake passage parallel portion of the intake passage (887) and the exhaust passage parallel portion of the exhaust passage (889),
The second dividing surface (x7) in the lower cylinder head cuts only the intake passage vertical portion and the exhaust passage vertical portion,
An intake valve line (8810) corresponding to the intake valve stem hole (8812) in the axial direction is formed in the lower cylinder head lower portion (8818),
An exhaust valve line (8820) corresponding to the exhaust valve stem hole (8822) in the axial direction is formed in the lower cylinder head lower portion (8818),
A fuel injector opening (886) is formed in the lower cylinder head lower portion (8818),
The joint surfaces of the intake passage (887) and the exhaust passage (889) on the first divided surface (x6) of the lower cylinder head and the second divided surface (x7) of the lower cylinder head are respectively sealed. A ring and / or adhesive seal is provided,
The lower cylinder head upper part (8816), the lower cylinder head middle part (8817) and the lower cylinder head lower part (8818) are connected to each other by welding, bonding, screw connection and / or riveting, respectively. 88) is constituted, The cylinder head according to any one of claims 1 to 8 characterized by things. A weld bead that integrally connects the lower cylinder head upper part (8816) and the lower cylinder head middle part (8817) is formed on the first dividing surface (x6) of the lower cylinder head,
A weld bead that integrally connects the lower cylinder head middle portion (8817) and the lower cylinder head lower portion (8818) is formed on the second dividing surface (x7) of the lower cylinder head. The cylinder head according to claim 12, characterized in that:   The intake valve stem hole conduit (8811) and / or the exhaust valve stem hole conduit (8821) are fitted into the intake valve stem hole (8812) and / or the exhaust valve stem hole (8822). The cylinder head according to any one of 1 to 8. A cylinder head according to claim 1, comprising a camshaft push rod hole (85),
The upper cylinder head (87) and the lower cylinder head (88) manufactured separately are configured,
The upper cylinder head (87) is passed through a fuel injector hole (876), an intake valve stem hole (8812) and an exhaust valve stem hole (8822) which are integrally die-cast with the lower cylinder head (88). Through-holes are provided for
The lower cylinder head (88) includes an intake passage (887), an exhaust passage (889), a head side water jacket (83), a fuel injector hole (876), an intake valve stem hole (8812), and an exhaust valve stem hole. (8822) is provided,
The cam shaft push rod hole (85) includes a cam shaft push rod hole upper cylinder head portion formed in the upper cylinder head (87) and a cam shaft push rod hole formed in the lower cylinder head (88). The lower cylinder head and
A weld bead (8030) that circulates inside the through hole for the cylinder head bolt hole is formed on the joint surface of the outer edge of the upper cylinder head (87) and the lower cylinder head (88),
A weld bead (8031) is provided in the outer periphery of the fuel injector hole (876) die-cast integrally with the lower cylinder head (88) and the connection through hole of the upper cylinder head (87),
A weld bead (8032) is provided in the outer periphery of the intake valve stem hole (8812) integrally die-cast with the lower cylinder head (88) and the connection through hole of the upper cylinder head (87).
A weld bead (8033) is provided on the outer periphery of the exhaust valve stem hole (8022) integrally die-cast with the lower cylinder head (88) and the connection through hole of the upper cylinder head (87).
A weld bead (8034) is provided around the opening of the connection hole of the camshaft push rod hole (85) on the dividing surface of the upper cylinder head (87) and the lower cylinder head (88).
The upper cylinder head (87) and the lower cylinder head (88) are welded by a weld bead (8030), a weld bead (8031), a weld bead (8032), a weld bead (8032), and a weld bead (8034). A cylinder head characterized in that a cylinder head (80) is formed. A cylinder head according to claim 1, comprising a camshaft push rod hole (85),
The upper cylinder head (87) and the lower cylinder head (88) manufactured separately are configured,
The upper cylinder head (87) includes a fuel injector hole (876), an intake valve stem hole (8812), an exhaust valve stem hole (8822), and a cylinder head that are integrally die-cast with the lower cylinder head (88). A through hole for passing the bolt hole (871) is provided,
The lower cylinder head (88) includes an intake passage (887), an exhaust passage (889), a head side water jacket (83), a fuel injector hole (876), a cylinder head bolt hole (871), an intake valve stem hole. (8812) and an exhaust valve stem hole (8822) are provided,
The cam shaft push rod hole (85) includes a cam shaft push rod hole upper cylinder head portion formed in the upper cylinder head (87) and a cam shaft push rod hole formed in the lower cylinder head (88). The lower cylinder head and
A weld bead (803) that circulates around the outer periphery is provided on the joint surface between the upper cylinder head (87) and the lower cylinder head (88),
A weld bead (8031) is provided in the outer periphery of the fuel injector hole (876) die-cast integrally with the lower cylinder head (88) and the connection through hole of the upper cylinder head (87),
A weld bead (8032) is provided in the outer periphery of the intake valve stem hole (8812) integrally die-cast with the lower cylinder head (88) and the connection through hole of the upper cylinder head (87).
A weld bead (8033) is provided in the outer periphery of the exhaust valve stem hole (8822) integrally die-cast with the lower cylinder head (88) and the connection through hole of the upper cylinder head (87).
A weld bead (8034) is provided around the opening of the connection hole of the camshaft push rod hole (85) on the dividing surface of the upper cylinder head (87) and the lower cylinder head (88).
A weld bead (8035) is provided around the opening of the connection hole of the upper cylinder head (87) and the upper cylinder head bolt hole (871),
The upper cylinder head (87) and the lower cylinder head (88) include a weld bead (803), a weld bead (8031), a weld bead (8032), a weld bead (8033), a weld bead (8034), and a weld bead (8034). 8035), and the cylinder head (80) is constructed.   On the outer wall of the cylinder head (80), through-holes (8762) for core extraction corresponding to the die-cast release dead zones of the fuel injector hole (876), the intake passage (887) and / or the exhaust passage (889) are provided. The cylinder head according to claim 1, 15 or 16, characterized in that a sealing plug (8763) is provided. When the cylinder head is die-cast, the movable mold core (8764) fitted into the lower die cast dead zone of the fuel injector hole, and the movable mold core (8765) fitted into the exhaust pipe lower die cast dead zone And / or a mold movable core (8766) fitted into the lower die cast dead zone of the intake pipe, and a mold movable core (8764) fitted into the lower die cast dead zone of the fuel injector hole, The movable mold core (8765) fitted into the exhaust pipe lower die cast dead zone and / or the movable mold core (8766) fitted into the intake pipe lower die cast dead zone are respectively moved outward when releasing. Extracted,
Stepped hole (8768) for fitting a sealing plug in the fuel injector hole, stepped hole (8769) for fitting a sealing plug in the exhaust pipe and / or fitting a sealing plug in the intake pipe The stepped holes (8770) for mounting are fitted with sealing plugs (8763) corresponding to the shape of each stepped hole,
The cylinder head according to claim 1, 15 or 16, wherein the connection between the sealing plug and the stepped hole can be realized by welding, bonding, screw connection and / or riveting. . The upper cylinder head (87) and the lower cylinder head (88) manufactured separately are configured,
When the upper cylinder head (87) and the lower cylinder head (88) are connected, the fuel injector hole (876), the intake valve stem hole (8812), and the exhaust formed in the lower cylinder head (88). The valve stem hole (8822) passes through the through hole for the fuel injector hole, the through hole for the intake valve stem hole, and the through hole for the exhaust valve stem hole formed in the upper cylinder head (87). Exposed on the upper surface of the cylinder head (87),
The outer edge of the upper cylinder head (87) is provided with a weld bead (8036) that circulates correspondingly outside the head side water jacket (83) in the lower cylinder head (88),
The upper cylinder head (87) includes a fuel injector hole weld bead (8031) that goes around the fuel injector hole (876) and an intake valve stem hole weld bead (8032) that goes around the intake valve stem hole (8812). And an exhaust valve stem hole weld bead (8033) that circulates around the exhaust valve stem hole (8822),
The upper cylinder head (87) and the lower cylinder head (88) include the weld bead (8036), the fuel injector hole weld bead (8031), the intake valve stem hole weld bead (8032), and the The cylinder head according to claim 1, wherein the cylinder head (80) is constituted by being connected by an exhaust valve stem hole weld bead (8033). When connecting the upper cylinder head (87) and the lower cylinder head (88), a cylinder head bolt hole (881), a fuel injector hole (876) formed in the lower cylinder head (88), An intake valve stem hole (8812) and an exhaust valve stem hole (8822) are a cylinder head bolt hole through hole, a fuel injector hole through hole, and an intake valve stem hole through hole formed in the upper cylinder head (87). Through the holes and the exhaust valve stem hole through holes correspondingly, and exposed on the upper surface of the upper cylinder head (87),
An intake passage (887) and an exhaust passage (889) formed in the lower cylinder head (88) correspond to an intake passage through hole and an exhaust passage through hole formed in the upper cylinder head (87), respectively. Close
The upper cylinder head (87) includes a cylinder head bolt hole weld bead (8035) that goes around the cylinder head bolt hole (881) and a fuel injector hole weld bead (8031) that goes around the fuel injector hole (876). An intake valve stem hole weld bead (8032) that circulates around the intake valve stem hole (8812), and an exhaust valve stem hole weld bead (8033) that circulates around the exhaust valve stem hole (8822), and The upper cylinder head (87) is provided with an intake passage and exhaust passage hole weld bead (8037) that goes around the intake passage and the exhaust passage through-hole,
A weld bead (8030) that circulates around the outer periphery of the cylinder head is provided on the joint surface between the lower portion of the upper cylinder head (87) and the bottom of the lower cylinder head (88),
The upper cylinder head (87) and the lower cylinder head (88) include the weld bead (8030), the fuel injector hole weld bead (8031), the intake valve stem hole weld bead (8032), and the exhaust. The cylinder head (80) is configured by being connected by the valve stem hole weld bead (8033), the cylinder head bolt hole weld bead (8035), and the intake passage and exhaust passage hole weld bead (8037). The cylinder head according to claim 1.   A water-cooled internal combustion engine comprising a main body (70) and a cylinder head (80) according to any one of claims 1 to 20 attached to the main body (70). A mechanical device to which a water-cooled internal combustion engine is attached,
The water-cooled internal combustion engine attached to the mechanical device is the water-cooled internal combustion engine according to claim 21.

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